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        <article data-uid="Hi.Common.Collections.ListUtil">



  <h1 id="Hi_Common_Collections_ListUtil" data-uid="Hi.Common.Collections.ListUtil" class="text-break">
Class ListUtil  
  </h1>

  <div class="facts text-secondary">
    <dl><dt>Namespace</dt><dd><a class="xref" href="Hi.html">Hi</a>.<a class="xref" href="Hi.Common.html">Common</a>.<a class="xref" href="Hi.Common.Collections.html">Collections</a></dd></dl>
  <dl><dt>Assembly</dt><dd>HiGeom.dll</dd></dl>
  </div>

  <div class="markdown summary"><p>Provides utility methods for working with lists and collections.</p>
</div>
  <div class="markdown conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static class ListUtil</code></pre>
  </div>




  <dl class="typelist inheritance">
    <dt>Inheritance</dt>
    <dd>
      <div><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object">object</a></div>
      <div><span class="xref">ListUtil</span></div>
    </dd>
  </dl>



  <dl class="typelist inheritedMembers">
    <dt>Inherited Members</dt>
    <dd>
    <div>
      <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object)">object.Equals(object)</a>
    </div>
    <div>
      <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object-system-object)">object.Equals(object, object)</a>
    </div>
    <div>
      <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.gethashcode">object.GetHashCode()</a>
    </div>
    <div>
      <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.gettype">object.GetType()</a>
    </div>
    <div>
      <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.memberwiseclone">object.MemberwiseClone()</a>
    </div>
    <div>
      <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.referenceequals">object.ReferenceEquals(object, object)</a>
    </div>
    <div>
      <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.tostring">object.ToString()</a>
    </div>
  </dd></dl>






  <h2 class="section" id="methods">Methods
</h2>


  <a id="Hi_Common_Collections_ListUtil_GetCeilIndex_" data-uid="Hi.Common.Collections.ListUtil.GetCeilIndex*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetCeilIndex__2_System_Collections_Generic_IList___0____1_System_Func___0___1_System_Int32__System_Int32__" data-uid="Hi.Common.Collections.ListUtil.GetCeilIndex``2(System.Collections.Generic.IList{``0},``1,System.Func{``0,``1,System.Int32},System.Int32@)">
  GetCeilIndex&lt;Item, ItemKey&gt;(IList&lt;Item&gt;, ItemKey, Func&lt;Item, ItemKey, int&gt;, out int)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets the ceiling index of an item in a sorted list based on a key comparison.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static BinarySearchResult GetCeilIndex&lt;Item, ItemKey&gt;(this IList&lt;Item&gt; sortedItems, ItemKey key, Func&lt;Item, ItemKey, int&gt; comparingFunc, out int index)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;Item&gt;</dt>
    <dd><p>The sorted list to search in.</p>
</dd>
    <dt><code>key</code> <span class="xref">ItemKey</span></dt>
    <dd><p>The key to search for.</p>
</dd>
    <dt><code>comparingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;Item, ItemKey, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a>&gt;</dt>
    <dd><p>A function that compares an item to the key.</p>
</dd>
    <dt><code>index</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd><p>When this method returns, contains the index of the ceiling item if found; otherwise, -1.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a></dt>
    <dd><p>A <a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a> indicating the result of the search.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>Item</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
    <dt><code>ItemKey</code></dt>
    <dd><p>The type of the key to search for.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetCeilIndex_" data-uid="Hi.Common.Collections.ListUtil.GetCeilIndex*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetCeilIndex__2_System_Collections_Generic_IList___1____0_System_Func___1___0__System_Int32__" data-uid="Hi.Common.Collections.ListUtil.GetCeilIndex``2(System.Collections.Generic.IList{``1},``0,System.Func{``1,``0},System.Int32@)">
  GetCeilIndex&lt;TKey, Item&gt;(IList&lt;Item&gt;, TKey, Func&lt;Item, TKey&gt;, out int)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets the ceiling index of an item in a sorted list based on a key selector function.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static BinarySearchResult GetCeilIndex&lt;TKey, Item&gt;(this IList&lt;Item&gt; sortedItems, TKey keyQuantity, Func&lt;Item, TKey&gt; getKeyQuantityFunc, out int index) where TKey : IComparable&lt;TKey&gt;</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;Item&gt;</dt>
    <dd><p>The sorted list to search in.</p>
</dd>
    <dt><code>keyQuantity</code> <span class="xref">TKey</span></dt>
    <dd><p>The key to search for.</p>
</dd>
    <dt><code>getKeyQuantityFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;Item, TKey&gt;</dt>
    <dd><p>A function that extracts the key from an item.</p>
</dd>
    <dt><code>index</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd><p>When this method returns, contains the index of the ceiling item if found; otherwise, -1.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a></dt>
    <dd><p>A <a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a> indicating the result of the search.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TKey</code></dt>
    <dd><p>The type of the key.</p>
</dd>
    <dt><code>Item</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetCeil_" data-uid="Hi.Common.Collections.ListUtil.GetCeil*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetCeil__2_System_Collections_Generic_IList___1____0_System_Func___1___0____1__" data-uid="Hi.Common.Collections.ListUtil.GetCeil``2(System.Collections.Generic.IList{``1},``0,System.Func{``1,``0},``1@)">
  GetCeil&lt;TKey, Item&gt;(IList&lt;Item&gt;, TKey, Func&lt;Item, TKey&gt;, out Item)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets the ceiling item in a sorted list based on a key selector function.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static BinarySearchResult GetCeil&lt;TKey, Item&gt;(this IList&lt;Item&gt; sortedItems, TKey keyQuantity, Func&lt;Item, TKey&gt; getKeyQuantityFunc, out Item dst) where TKey : IComparable&lt;TKey&gt;</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;Item&gt;</dt>
    <dd><p>The sorted list to search in.</p>
</dd>
    <dt><code>keyQuantity</code> <span class="xref">TKey</span></dt>
    <dd><p>The key to search for.</p>
</dd>
    <dt><code>getKeyQuantityFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;Item, TKey&gt;</dt>
    <dd><p>A function that extracts the key from an item.</p>
</dd>
    <dt><code>dst</code> <span class="xref">Item</span></dt>
    <dd><p>When this method returns, contains the ceiling item if found; otherwise, the default value for the type.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a></dt>
    <dd><p>A <a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a> indicating the result of the search.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TKey</code></dt>
    <dd><p>The type of the key.</p>
</dd>
    <dt><code>Item</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetFloorIndex_" data-uid="Hi.Common.Collections.ListUtil.GetFloorIndex*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetFloorIndex__2_System_Collections_Generic_IList___0____1_System_Func___0___1_System_Int32__System_Int32__" data-uid="Hi.Common.Collections.ListUtil.GetFloorIndex``2(System.Collections.Generic.IList{``0},``1,System.Func{``0,``1,System.Int32},System.Int32@)">
  GetFloorIndex&lt;Item, ItemKey&gt;(IList&lt;Item&gt;, ItemKey, Func&lt;Item, ItemKey, int&gt;, out int)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets the floor index of an item in a sorted list based on a key comparison.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static BinarySearchResult GetFloorIndex&lt;Item, ItemKey&gt;(this IList&lt;Item&gt; sortedItems, ItemKey key, Func&lt;Item, ItemKey, int&gt; comparingFunc, out int index)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;Item&gt;</dt>
    <dd><p>The sorted list to search in.</p>
</dd>
    <dt><code>key</code> <span class="xref">ItemKey</span></dt>
    <dd><p>The key to search for.</p>
</dd>
    <dt><code>comparingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;Item, ItemKey, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a>&gt;</dt>
    <dd><p>A function that compares an item to the key.</p>
</dd>
    <dt><code>index</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd><p>When this method returns, contains the index of the floor item if found; otherwise, -1.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a></dt>
    <dd><p>A <a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a> indicating the result of the search.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>Item</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
    <dt><code>ItemKey</code></dt>
    <dd><p>The type of the key to search for.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetFloorIndex_" data-uid="Hi.Common.Collections.ListUtil.GetFloorIndex*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetFloorIndex__2_System_Collections_Generic_IList___1____0_System_Func___1___0__System_Int32__" data-uid="Hi.Common.Collections.ListUtil.GetFloorIndex``2(System.Collections.Generic.IList{``1},``0,System.Func{``1,``0},System.Int32@)">
  GetFloorIndex&lt;TKey, Item&gt;(IList&lt;Item&gt;, TKey, Func&lt;Item, TKey&gt;, out int)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets the floor index of an item in a sorted list based on a key selector function.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static BinarySearchResult GetFloorIndex&lt;TKey, Item&gt;(this IList&lt;Item&gt; sortedItems, TKey key, Func&lt;Item, TKey&gt; getKeyFunc, out int index) where TKey : IComparable&lt;TKey&gt;</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;Item&gt;</dt>
    <dd><p>The sorted list to search in.</p>
</dd>
    <dt><code>key</code> <span class="xref">TKey</span></dt>
    <dd><p>The key to search for.</p>
</dd>
    <dt><code>getKeyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;Item, TKey&gt;</dt>
    <dd><p>A function that extracts the key from an item.</p>
</dd>
    <dt><code>index</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd><p>When this method returns, contains the index of the floor item if found; otherwise, -1.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a></dt>
    <dd><p>A <a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a> indicating the result of the search.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TKey</code></dt>
    <dd><p>The type of the key.</p>
</dd>
    <dt><code>Item</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetFloor_" data-uid="Hi.Common.Collections.ListUtil.GetFloor*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetFloor__2_System_Collections_Generic_IList___1____0_System_Func___1___0____1__" data-uid="Hi.Common.Collections.ListUtil.GetFloor``2(System.Collections.Generic.IList{``1},``0,System.Func{``1,``0},``1@)">
  GetFloor&lt;TKey, Item&gt;(IList&lt;Item&gt;, TKey, Func&lt;Item, TKey&gt;, out Item)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets the floor item in a sorted list based on a key selector function.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static BinarySearchResult GetFloor&lt;TKey, Item&gt;(this IList&lt;Item&gt; sortedItems, TKey keyQuantity, Func&lt;Item, TKey&gt; getKeyQuantityFunc, out Item dst) where TKey : IComparable&lt;TKey&gt;</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;Item&gt;</dt>
    <dd><p>The sorted list to search in.</p>
</dd>
    <dt><code>keyQuantity</code> <span class="xref">TKey</span></dt>
    <dd><p>The key to search for.</p>
</dd>
    <dt><code>getKeyQuantityFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;Item, TKey&gt;</dt>
    <dd><p>A function that extracts the key from an item.</p>
</dd>
    <dt><code>dst</code> <span class="xref">Item</span></dt>
    <dd><p>When this method returns, contains the floor item if found; otherwise, the default value for the type.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a></dt>
    <dd><p>A <a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a> indicating the result of the search.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TKey</code></dt>
    <dd><p>The type of the key.</p>
</dd>
    <dt><code>Item</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetIndexBasedEnumerable_" data-uid="Hi.Common.Collections.ListUtil.GetIndexBasedEnumerable*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetIndexBasedEnumerable__1_System_Collections_Generic_IList___0__" data-uid="Hi.Common.Collections.ListUtil.GetIndexBasedEnumerable``1(System.Collections.Generic.IList{``0})">
  GetIndexBasedEnumerable&lt;TItem&gt;(IList&lt;TItem&gt;)
  
  </h3>

  <div class="markdown level1 summary"><p>Creates an enumerable that provides access to all elements in a list by index.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static ListIndexBasedEnumerable&lt;TItem&gt; GetIndexBasedEnumerable&lt;TItem&gt;(this IList&lt;TItem&gt; src)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>src</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;TItem&gt;</dt>
    <dd><p>The source list</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="Hi.Common.Collections.ListIndexBasedEnumerable-1.html">ListIndexBasedEnumerable</a>&lt;TItem&gt;</dt>
    <dd><p>A ListIndexBasedEnumerable for the entire list</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of elements in the list</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetIndexBasedEnumerable_" data-uid="Hi.Common.Collections.ListUtil.GetIndexBasedEnumerable*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetIndexBasedEnumerable__1_System_Collections_Generic_IList___0__System_Int32_System_Int32_" data-uid="Hi.Common.Collections.ListUtil.GetIndexBasedEnumerable``1(System.Collections.Generic.IList{``0},System.Int32,System.Int32)">
  GetIndexBasedEnumerable&lt;TItem&gt;(IList&lt;TItem&gt;, int, int)
  
  </h3>

  <div class="markdown level1 summary"><p>Creates an enumerable that provides access to a range of elements in a list by index.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static ListIndexBasedEnumerable&lt;TItem&gt; GetIndexBasedEnumerable&lt;TItem&gt;(this IList&lt;TItem&gt; src, int begin, int end)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>src</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;TItem&gt;</dt>
    <dd><p>The source list</p>
</dd>
    <dt><code>begin</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd><p>The starting index (inclusive)</p>
</dd>
    <dt><code>end</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd><p>The ending index (exclusive)</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="Hi.Common.Collections.ListIndexBasedEnumerable-1.html">ListIndexBasedEnumerable</a>&lt;TItem&gt;</dt>
    <dd><p>A ListIndexBasedEnumerable for the specified range</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of elements in the list</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetIndexByBinarySearch_" data-uid="Hi.Common.Collections.ListUtil.GetIndexByBinarySearch*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetIndexByBinarySearch__1_System_Collections_Generic_IList___0____0_" data-uid="Hi.Common.Collections.ListUtil.GetIndexByBinarySearch``1(System.Collections.Generic.IList{``0},``0)">
  GetIndexByBinarySearch&lt;TItem&gt;(IList&lt;TItem&gt;, TItem)
  
  </h3>

  <div class="markdown level1 summary"><p>Performs a binary search on the specified collection.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static int GetIndexByBinarySearch&lt;TItem&gt;(this IList&lt;TItem&gt; sortedItems, TItem value)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;TItem&gt;</dt>
    <dd><p>The list to be searched.</p>
</dd>
    <dt><code>value</code> <span class="xref">TItem</span></dt>
    <dd><p>The value to search for.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd></dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of the item.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetIndexByBinarySearch_" data-uid="Hi.Common.Collections.ListUtil.GetIndexByBinarySearch*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetIndexByBinarySearch__1_System_Collections_Generic_IList___0____0_System_Collections_Generic_IComparer___0__" data-uid="Hi.Common.Collections.ListUtil.GetIndexByBinarySearch``1(System.Collections.Generic.IList{``0},``0,System.Collections.Generic.IComparer{``0})">
  GetIndexByBinarySearch&lt;TItem&gt;(IList&lt;TItem&gt;, TItem, IComparer&lt;TItem&gt;)
  
  </h3>

  <div class="markdown level1 summary"><p>Performs a binary search on the specified collection.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static int GetIndexByBinarySearch&lt;TItem&gt;(this IList&lt;TItem&gt; sortedItems, TItem value, IComparer&lt;TItem&gt; comparer)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;TItem&gt;</dt>
    <dd><p>The list to be searched.</p>
</dd>
    <dt><code>value</code> <span class="xref">TItem</span></dt>
    <dd><p>The value to search for.</p>
</dd>
    <dt><code>comparer</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.icomparer-1">IComparer</a>&lt;TItem&gt;</dt>
    <dd><p>The comparer that is used to compare the value
with the list items.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd></dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of the item.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetIndexByBinarySearch_" data-uid="Hi.Common.Collections.ListUtil.GetIndexByBinarySearch*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetIndexByBinarySearch__2_System_Collections_Generic_IList___0____1_System_Func___1___0_System_Int32__" data-uid="Hi.Common.Collections.ListUtil.GetIndexByBinarySearch``2(System.Collections.Generic.IList{``0},``1,System.Func{``1,``0,System.Int32})">
  GetIndexByBinarySearch&lt;TItem, TSearch&gt;(IList&lt;TItem&gt;, TSearch, Func&lt;TSearch, TItem, int&gt;)
  
  </h3>

  <div class="markdown level1 summary"><p>Performs a binary search on the specified collection.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static int GetIndexByBinarySearch&lt;TItem, TSearch&gt;(this IList&lt;TItem&gt; sortedItems, TSearch value, Func&lt;TSearch, TItem, int&gt; comparer)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;TItem&gt;</dt>
    <dd><p>The list to be searched.</p>
</dd>
    <dt><code>value</code> <span class="xref">TSearch</span></dt>
    <dd><p>The value to search for.</p>
</dd>
    <dt><code>comparer</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TSearch, TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a>&gt;</dt>
    <dd><p>The comparer that is used to compare the value
with the list items.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd></dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of the item.</p>
</dd>
    <dt><code>TSearch</code></dt>
    <dd><p>The type of the searched item.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetInterpolatedBoundary_" data-uid="Hi.Common.Collections.ListUtil.GetInterpolatedBoundary*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetInterpolatedBoundary__1_System_Collections_Generic_List___0__System_Double_System_Double_System_Func___0_System_Double____0____0____0__" data-uid="Hi.Common.Collections.ListUtil.GetInterpolatedBoundary``1(System.Collections.Generic.List{``0},System.Double,System.Double,System.Func{``0,System.Double},``0@,``0@,``0@)">
  GetInterpolatedBoundary&lt;TItem&gt;(List&lt;TItem&gt;, double, double, Func&lt;TItem, double&gt;, out TItem, out TItem, out TItem)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets interpolated boundary items from a list based on a key value and interval.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static void GetInterpolatedBoundary&lt;TItem&gt;(this List&lt;TItem&gt; scpList, double z, double zInterval, Func&lt;TItem, double&gt; keyFunc, out TItem cur, out TItem floor, out TItem ceil) where TItem : IAdditionOperators&lt;TItem, TItem, TItem&gt;, IMultiplyOperators&lt;TItem, double, TItem&gt;</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>scpList</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The source list.</p>
</dd>
    <dt><code>z</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a></dt>
    <dd><p>The key value to find or interpolate at.</p>
</dd>
    <dt><code>zInterval</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a></dt>
    <dd><p>The interval to consider around the key value.</p>
</dd>
    <dt><code>keyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>&gt;</dt>
    <dd><p>A function that extracts the key from an item.</p>
</dd>
    <dt><code>cur</code> <span class="xref">TItem</span></dt>
    <dd><p>When this method returns, contains the interpolated item at the key value.</p>
</dd>
    <dt><code>floor</code> <span class="xref">TItem</span></dt>
    <dd><p>When this method returns, contains the floor item.</p>
</dd>
    <dt><code>ceil</code> <span class="xref">TItem</span></dt>
    <dd><p>When this method returns, contains the ceiling item.</p>
</dd>
  </dl>


  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list, which must support addition and multiplication operators.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetInterpolatedValue_" data-uid="Hi.Common.Collections.ListUtil.GetInterpolatedValue*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetInterpolatedValue__1_System_Collections_Generic_List___0__System_Double_System_Func___0_System_Double__Hi_Common_Collections_ListUtil_OuterPolationMode_" data-uid="Hi.Common.Collections.ListUtil.GetInterpolatedValue``1(System.Collections.Generic.List{``0},System.Double,System.Func{``0,System.Double},Hi.Common.Collections.ListUtil.OuterPolationMode)">
  GetInterpolatedValue&lt;TItem&gt;(List&lt;TItem&gt;, double, Func&lt;TItem, double&gt;, OuterPolationMode)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets an interpolated value from a sorted list based on a double key, using operators for addition and multiplication.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static TItem GetInterpolatedValue&lt;TItem&gt;(this List&lt;TItem&gt; sortedItems, double keyQuantity, Func&lt;TItem, double&gt; getKeyQuantityFunc, ListUtil.OuterPolationMode outerPolationMode) where TItem : IAdditionOperators&lt;TItem, TItem, TItem&gt;, IMultiplyOperators&lt;TItem, double, TItem&gt;</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The sorted list to interpolate from.</p>
</dd>
    <dt><code>keyQuantity</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a></dt>
    <dd><p>The key to find or interpolate at.</p>
</dd>
    <dt><code>getKeyQuantityFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>&gt;</dt>
    <dd><p>A function that extracts the key from an item.</p>
</dd>
    <dt><code>outerPolationMode</code> <a class="xref" href="Hi.Common.Collections.ListUtil.html">ListUtil</a>.<a class="xref" href="Hi.Common.Collections.ListUtil.OuterPolationMode.html">OuterPolationMode</a></dt>
    <dd><p>The mode to use when the key is outside the range of the list.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><span class="xref">TItem</span></dt>
    <dd><p>The interpolated value.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list, which must support addition and multiplication operators.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetInterpolatedValue_" data-uid="Hi.Common.Collections.ListUtil.GetInterpolatedValue*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetInterpolatedValue__1_System_Collections_Generic_List___0__System_Double_System_Func___0_System_Double__System_Func___0___0___0__System_Func___0_System_Double___0__Hi_Common_Collections_ListUtil_OuterPolationMode_" data-uid="Hi.Common.Collections.ListUtil.GetInterpolatedValue``1(System.Collections.Generic.List{``0},System.Double,System.Func{``0,System.Double},System.Func{``0,``0,``0},System.Func{``0,System.Double,``0},Hi.Common.Collections.ListUtil.OuterPolationMode)">
  GetInterpolatedValue&lt;TItem&gt;(List&lt;TItem&gt;, double, Func&lt;TItem, double&gt;, Func&lt;TItem, TItem, TItem&gt;, Func&lt;TItem, double, TItem&gt;, OuterPolationMode)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets an interpolated value from a sorted list based on a double key.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static TItem GetInterpolatedValue&lt;TItem&gt;(this List&lt;TItem&gt; sortedItems, double key, Func&lt;TItem, double&gt; getKeyFunc, Func&lt;TItem, TItem, TItem&gt; itemAddingFunc, Func&lt;TItem, double, TItem&gt; itemScalingFunc, ListUtil.OuterPolationMode outerPolationMode)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The sorted list to interpolate from.</p>
</dd>
    <dt><code>key</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a></dt>
    <dd><p>The key to find or interpolate at.</p>
</dd>
    <dt><code>getKeyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>&gt;</dt>
    <dd><p>A function that extracts the key from an item.</p>
</dd>
    <dt><code>itemAddingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, TItem, TItem&gt;</dt>
    <dd><p>A function that adds two items together.</p>
</dd>
    <dt><code>itemScalingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>, TItem&gt;</dt>
    <dd><p>A function that scales an item by a factor.</p>
</dd>
    <dt><code>outerPolationMode</code> <a class="xref" href="Hi.Common.Collections.ListUtil.html">ListUtil</a>.<a class="xref" href="Hi.Common.Collections.ListUtil.OuterPolationMode.html">OuterPolationMode</a></dt>
    <dd><p>The mode to use when the key is outside the range of the list.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><span class="xref">TItem</span></dt>
    <dd><p>The interpolated value.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetInterpolatedValue_" data-uid="Hi.Common.Collections.ListUtil.GetInterpolatedValue*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetInterpolatedValue__1_System_Collections_Generic_List___0__System_TimeSpan_System_Func___0_System_TimeSpan__Hi_Common_Collections_ListUtil_OuterPolationMode_" data-uid="Hi.Common.Collections.ListUtil.GetInterpolatedValue``1(System.Collections.Generic.List{``0},System.TimeSpan,System.Func{``0,System.TimeSpan},Hi.Common.Collections.ListUtil.OuterPolationMode)">
  GetInterpolatedValue&lt;TItem&gt;(List&lt;TItem&gt;, TimeSpan, Func&lt;TItem, TimeSpan&gt;, OuterPolationMode)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets an interpolated value from a sorted list based on a TimeSpan key, using operators for addition and multiplication.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static TItem GetInterpolatedValue&lt;TItem&gt;(this List&lt;TItem&gt; sortedItems, TimeSpan keyQuantity, Func&lt;TItem, TimeSpan&gt; getKeyQuantityFunc, ListUtil.OuterPolationMode outerPolationMode) where TItem : IAdditionOperators&lt;TItem, TItem, TItem&gt;, IMultiplyOperators&lt;TItem, double, TItem&gt;</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The sorted list to interpolate from.</p>
</dd>
    <dt><code>keyQuantity</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.timespan">TimeSpan</a></dt>
    <dd><p>The TimeSpan key to find or interpolate at.</p>
</dd>
    <dt><code>getKeyQuantityFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.timespan">TimeSpan</a>&gt;</dt>
    <dd><p>A function that extracts the TimeSpan key from an item.</p>
</dd>
    <dt><code>outerPolationMode</code> <a class="xref" href="Hi.Common.Collections.ListUtil.html">ListUtil</a>.<a class="xref" href="Hi.Common.Collections.ListUtil.OuterPolationMode.html">OuterPolationMode</a></dt>
    <dd><p>The mode to use when the key is outside the range of the list.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><span class="xref">TItem</span></dt>
    <dd><p>The interpolated value.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list, which must support addition and multiplication operators.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetInterpolatedValue_" data-uid="Hi.Common.Collections.ListUtil.GetInterpolatedValue*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetInterpolatedValue__1_System_Collections_Generic_List___0__System_TimeSpan_System_Func___0_System_TimeSpan__System_Func___0___0___0__System_Func___0_System_Double___0__Hi_Common_Collections_ListUtil_OuterPolationMode_" data-uid="Hi.Common.Collections.ListUtil.GetInterpolatedValue``1(System.Collections.Generic.List{``0},System.TimeSpan,System.Func{``0,System.TimeSpan},System.Func{``0,``0,``0},System.Func{``0,System.Double,``0},Hi.Common.Collections.ListUtil.OuterPolationMode)">
  GetInterpolatedValue&lt;TItem&gt;(List&lt;TItem&gt;, TimeSpan, Func&lt;TItem, TimeSpan&gt;, Func&lt;TItem, TItem, TItem&gt;, Func&lt;TItem, double, TItem&gt;, OuterPolationMode)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets an interpolated value from a sorted list based on a TimeSpan key.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static TItem GetInterpolatedValue&lt;TItem&gt;(this List&lt;TItem&gt; sortedItems, TimeSpan key, Func&lt;TItem, TimeSpan&gt; getKeyFunc, Func&lt;TItem, TItem, TItem&gt; itemAddingFunc, Func&lt;TItem, double, TItem&gt; itemScalingFunc, ListUtil.OuterPolationMode outerPolationMode)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The sorted list to interpolate from.</p>
</dd>
    <dt><code>key</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.timespan">TimeSpan</a></dt>
    <dd><p>The TimeSpan key to find or interpolate at.</p>
</dd>
    <dt><code>getKeyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.timespan">TimeSpan</a>&gt;</dt>
    <dd><p>A function that extracts the TimeSpan key from an item.</p>
</dd>
    <dt><code>itemAddingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, TItem, TItem&gt;</dt>
    <dd><p>A function that adds two items together.</p>
</dd>
    <dt><code>itemScalingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>, TItem&gt;</dt>
    <dd><p>A function that scales an item by a factor.</p>
</dd>
    <dt><code>outerPolationMode</code> <a class="xref" href="Hi.Common.Collections.ListUtil.html">ListUtil</a>.<a class="xref" href="Hi.Common.Collections.ListUtil.OuterPolationMode.html">OuterPolationMode</a></dt>
    <dd><p>The mode to use when the key is outside the range of the list.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><span class="xref">TItem</span></dt>
    <dd><p>The interpolated value.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetInterpolatedValue_" data-uid="Hi.Common.Collections.ListUtil.GetInterpolatedValue*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetInterpolatedValue__2_System_Collections_Generic_List___1____0_System_Func___1___0__System_Func___0___0_System_Int32__System_Func___0___0___0__System_Func___0___0_System_Double__System_Func___1___1___1__System_Func___1_System_Double___1__Hi_Common_Collections_ListUtil_OuterPolationMode_" data-uid="Hi.Common.Collections.ListUtil.GetInterpolatedValue``2(System.Collections.Generic.List{``1},``0,System.Func{``1,``0},System.Func{``0,``0,System.Int32},System.Func{``0,``0,``0},System.Func{``0,``0,System.Double},System.Func{``1,``1,``1},System.Func{``1,System.Double,``1},Hi.Common.Collections.ListUtil.OuterPolationMode)">
  GetInterpolatedValue&lt;TKey, TItem&gt;(List&lt;TItem&gt;, TKey, Func&lt;TItem, TKey&gt;, Func&lt;TKey, TKey, int&gt;, Func&lt;TKey, TKey, TKey&gt;, Func&lt;TKey, TKey, double&gt;, Func&lt;TItem, TItem, TItem&gt;, Func&lt;TItem, double, TItem&gt;, OuterPolationMode)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets an interpolated value from a sorted list based on a key using custom comparison and arithmetic functions.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static TItem GetInterpolatedValue&lt;TKey, TItem&gt;(this List&lt;TItem&gt; sortedItems, TKey key, Func&lt;TItem, TKey&gt; getKeyFunc, Func&lt;TKey, TKey, int&gt; keyCompareFunc, Func&lt;TKey, TKey, TKey&gt; keyMinusFunc, Func&lt;TKey, TKey, double&gt; keyDivFunc, Func&lt;TItem, TItem, TItem&gt; addingFunc, Func&lt;TItem, double, TItem&gt; scalingFunc, ListUtil.OuterPolationMode outerPolationMode)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The sorted list of items</p>
</dd>
    <dt><code>key</code> <span class="xref">TKey</span></dt>
    <dd><p>The key to search for</p>
</dd>
    <dt><code>getKeyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, TKey&gt;</dt>
    <dd><p>A function that extracts the key from an item</p>
</dd>
    <dt><code>keyCompareFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TKey, TKey, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a>&gt;</dt>
    <dd><p>A function that compares two keys</p>
</dd>
    <dt><code>keyMinusFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TKey, TKey, TKey&gt;</dt>
    <dd><p>A function that subtracts one key from another</p>
</dd>
    <dt><code>keyDivFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TKey, TKey, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>&gt;</dt>
    <dd><p>A function that divides one key by another</p>
</dd>
    <dt><code>addingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, TItem, TItem&gt;</dt>
    <dd><p>A function that adds two items</p>
</dd>
    <dt><code>scalingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>, TItem&gt;</dt>
    <dd><p>A function that scales an item by a factor</p>
</dd>
    <dt><code>outerPolationMode</code> <a class="xref" href="Hi.Common.Collections.ListUtil.html">ListUtil</a>.<a class="xref" href="Hi.Common.Collections.ListUtil.OuterPolationMode.html">OuterPolationMode</a></dt>
    <dd><p>The mode for handling values outside the range</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><span class="xref">TItem</span></dt>
    <dd><p>The interpolated value</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TKey</code></dt>
    <dd><p>The type of the key</p>
</dd>
    <dt><code>TItem</code></dt>
    <dd><p>The type of elements in the list</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetListByKeyBoundary_" data-uid="Hi.Common.Collections.ListUtil.GetListByKeyBoundary*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetListByKeyBoundary__2_System_Collections_Generic_List___1__System_Func___1___0____0_System_Boolean___0_System_Boolean_" data-uid="Hi.Common.Collections.ListUtil.GetListByKeyBoundary``2(System.Collections.Generic.List{``1},System.Func{``1,``0},``0,System.Boolean,``0,System.Boolean)">
  GetListByKeyBoundary&lt;TKey, TItem&gt;(List&lt;TItem&gt;, Func&lt;TItem, TKey&gt;, TKey, bool, TKey, bool)
  
  </h3>

  <div class="markdown level1 summary"><p>Gets a subset of a sorted list based on key boundaries.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static List&lt;TItem&gt; GetListByKeyBoundary&lt;TKey, TItem&gt;(this List&lt;TItem&gt; sortedItems, Func&lt;TItem, TKey&gt; getKeyQuantityFunc, TKey begin, bool isIncludingBeginFloor, TKey end, bool isIncludingEndCeil) where TKey : IComparable&lt;TKey&gt;</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>sortedItems</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The sorted list to filter.</p>
</dd>
    <dt><code>getKeyQuantityFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, TKey&gt;</dt>
    <dd><p>A function that extracts the key from an item.</p>
</dd>
    <dt><code>begin</code> <span class="xref">TKey</span></dt>
    <dd><p>The beginning key of the range.</p>
</dd>
    <dt><code>isIncludingBeginFloor</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></dt>
    <dd><p>Whether to include the floor of the beginning key.</p>
</dd>
    <dt><code>end</code> <span class="xref">TKey</span></dt>
    <dd><p>The ending key of the range.</p>
</dd>
    <dt><code>isIncludingEndCeil</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></dt>
    <dd><p>Whether to include the ceiling of the ending key.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>A new list containing only the items within the specified key range.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TKey</code></dt>
    <dd><p>The type of the key, which must be comparable.</p>
</dd>
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetNearestIndex_" data-uid="Hi.Common.Collections.ListUtil.GetNearestIndex*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetNearestIndex__2_System_Collections_Generic_IList___0____1_System_Func___0___1_System_Double__System_Int32__" data-uid="Hi.Common.Collections.ListUtil.GetNearestIndex``2(System.Collections.Generic.IList{``0},``1,System.Func{``0,``1,System.Double},System.Int32@)">
  GetNearestIndex&lt;TItem, TItemKey&gt;(IList&lt;TItem&gt;, TItemKey, Func&lt;TItem, TItemKey, double&gt;, out int)
  
  </h3>

  <div class="markdown level1 summary"><p>Finds the index of the element in a sorted list that is nearest to the specified key.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static BinarySearchResult GetNearestIndex&lt;TItem, TItemKey&gt;(this IList&lt;TItem&gt; src, TItemKey key, Func&lt;TItem, TItemKey, double&gt; itemToKeyDistanceFunc, out int index)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>src</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;TItem&gt;</dt>
    <dd><p>The source list</p>
</dd>
    <dt><code>key</code> <span class="xref">TItemKey</span></dt>
    <dd><p>The key to search for</p>
</dd>
    <dt><code>itemToKeyDistanceFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, TItemKey, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>&gt;</dt>
    <dd><p>A function that calculates the distance between an item and the key</p>
</dd>
    <dt><code>index</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd><p>When this method returns, contains the index of the nearest element if found; otherwise, -1</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a></dt>
    <dd><p>A BinarySearchResult indicating the result of the search</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of elements in the list</p>
</dd>
    <dt><code>TItemKey</code></dt>
    <dd><p>The type of the key to search for</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetNearestIndex_" data-uid="Hi.Common.Collections.ListUtil.GetNearestIndex*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetNearestIndex__2_System_Collections_Generic_IList___0____1_System_Func___0___1_System_Int32__System_Func___0___1_System_Double__System_Int32__" data-uid="Hi.Common.Collections.ListUtil.GetNearestIndex``2(System.Collections.Generic.IList{``0},``1,System.Func{``0,``1,System.Int32},System.Func{``0,``1,System.Double},System.Int32@)">
  GetNearestIndex&lt;TItem, TItemKey&gt;(IList&lt;TItem&gt;, TItemKey, Func&lt;TItem, TItemKey, int&gt;, Func&lt;TItem, TItemKey, double&gt;, out int)
  
  </h3>

  <div class="markdown level1 summary"><p>Finds the index of the element in a sorted list that is nearest to the specified key using custom comparison functions.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static BinarySearchResult GetNearestIndex&lt;TItem, TItemKey&gt;(this IList&lt;TItem&gt; src, TItemKey key, Func&lt;TItem, TItemKey, int&gt; itemCompareToKeyFunc, Func&lt;TItem, TItemKey, double&gt; itemToKeyDistanceFunc, out int index)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>src</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;TItem&gt;</dt>
    <dd><p>The source list (must be in ascending order)</p>
</dd>
    <dt><code>key</code> <span class="xref">TItemKey</span></dt>
    <dd><p>The key to search for</p>
</dd>
    <dt><code>itemCompareToKeyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, TItemKey, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a>&gt;</dt>
    <dd><p>A function that compares an item to the key</p>
</dd>
    <dt><code>itemToKeyDistanceFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, TItemKey, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>&gt;</dt>
    <dd><p>A function that calculates the distance between an item and the key</p>
</dd>
    <dt><code>index</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd><p>When this method returns, contains the index of the nearest element if found; otherwise, -1</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="Hi.Common.BinarySearchResult.html">BinarySearchResult</a></dt>
    <dd><p>A BinarySearchResult indicating the result of the search</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of elements in the list</p>
</dd>
    <dt><code>TItemKey</code></dt>
    <dd><p>The type of the key to search for</p>
</dd>
  </dl>







  <h4 class="section">Exceptions</h4>
  <dl class="parameters">
    <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.invalidprogramexception">InvalidProgramException</a></dt>
    <dd><p>Thrown when an unexpected search result occurs</p>
</dd>
  </dl>



  <a id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedHeadAndTail_" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedHeadAndTail*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedHeadAndTail__1_System_Collections_Generic_List___0__System_Double_System_Double_System_Func___0_System_Double__System_Func___0___0___0__System_Func___0_System_Double___0__" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedHeadAndTail``1(System.Collections.Generic.List{``0},System.Double,System.Double,System.Func{``0,System.Double},System.Func{``0,``0,``0},System.Func{``0,System.Double,``0})">
  GetSubListWithInterpolatedHeadAndTail&lt;TItem&gt;(List&lt;TItem&gt;, double, double, Func&lt;TItem, double&gt;, Func&lt;TItem, TItem, TItem&gt;, Func&lt;TItem, double, TItem&gt;)
  
  </h3>

  <div class="markdown level1 summary"><p>Creates a new list with interpolated head and tail items based on the specified double key range.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static List&lt;TItem&gt; GetSubListWithInterpolatedHeadAndTail&lt;TItem&gt;(this List&lt;TItem&gt; src, double beginKey, double endKey, Func&lt;TItem, double&gt; getKeyFunc, Func&lt;TItem, TItem, TItem&gt; itemAddingFunc, Func&lt;TItem, double, TItem&gt; itemScalingFunc)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>src</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The source list.</p>
</dd>
    <dt><code>beginKey</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a></dt>
    <dd><p>The beginning key of the range.</p>
</dd>
    <dt><code>endKey</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a></dt>
    <dd><p>The ending key of the range.</p>
</dd>
    <dt><code>getKeyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>&gt;</dt>
    <dd><p>A function that extracts the double key from an item.</p>
</dd>
    <dt><code>itemAddingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, TItem, TItem&gt;</dt>
    <dd><p>A function that adds two items together.</p>
</dd>
    <dt><code>itemScalingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>, TItem&gt;</dt>
    <dd><p>A function that scales an item by a factor.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>A new list with interpolated head and tail items.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedHeadAndTail_" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedHeadAndTail*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedHeadAndTail__1_System_Collections_Generic_List___0__System_TimeSpan_System_TimeSpan_System_Func___0_System_TimeSpan__System_Func___0___0___0__System_Func___0_System_Double___0__" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedHeadAndTail``1(System.Collections.Generic.List{``0},System.TimeSpan,System.TimeSpan,System.Func{``0,System.TimeSpan},System.Func{``0,``0,``0},System.Func{``0,System.Double,``0})">
  GetSubListWithInterpolatedHeadAndTail&lt;TItem&gt;(List&lt;TItem&gt;, TimeSpan, TimeSpan, Func&lt;TItem, TimeSpan&gt;, Func&lt;TItem, TItem, TItem&gt;, Func&lt;TItem, double, TItem&gt;)
  
  </h3>

  <div class="markdown level1 summary"><p>Creates a new list with interpolated head and tail items based on the specified TimeSpan key range.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static List&lt;TItem&gt; GetSubListWithInterpolatedHeadAndTail&lt;TItem&gt;(this List&lt;TItem&gt; src, TimeSpan beginKey, TimeSpan endKey, Func&lt;TItem, TimeSpan&gt; getKeyFunc, Func&lt;TItem, TItem, TItem&gt; itemAddingFunc, Func&lt;TItem, double, TItem&gt; itemScalingFunc)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>src</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The source list.</p>
</dd>
    <dt><code>beginKey</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.timespan">TimeSpan</a></dt>
    <dd><p>The beginning TimeSpan key of the range.</p>
</dd>
    <dt><code>endKey</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.timespan">TimeSpan</a></dt>
    <dd><p>The ending TimeSpan key of the range.</p>
</dd>
    <dt><code>getKeyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.timespan">TimeSpan</a>&gt;</dt>
    <dd><p>A function that extracts the TimeSpan key from an item.</p>
</dd>
    <dt><code>itemAddingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, TItem, TItem&gt;</dt>
    <dd><p>A function that adds two items together.</p>
</dd>
    <dt><code>itemScalingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>, TItem&gt;</dt>
    <dd><p>A function that scales an item by a factor.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>A new list with interpolated head and tail items.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedHeadAndTail_" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedHeadAndTail*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedHeadAndTail__2_System_Collections_Generic_List___1____0___0_System_Func___1___0__System_Func___0___0_System_Int32__System_Func___0___0___0__System_Func___0___0_System_Double__System_Func___1___1___1__System_Func___1_System_Double___1__" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedHeadAndTail``2(System.Collections.Generic.List{``1},``0,``0,System.Func{``1,``0},System.Func{``0,``0,System.Int32},System.Func{``0,``0,``0},System.Func{``0,``0,System.Double},System.Func{``1,``1,``1},System.Func{``1,System.Double,``1})">
  GetSubListWithInterpolatedHeadAndTail&lt;TKey, TItem&gt;(List&lt;TItem&gt;, TKey, TKey, Func&lt;TItem, TKey&gt;, Func&lt;TKey, TKey, int&gt;, Func&lt;TKey, TKey, TKey&gt;, Func&lt;TKey, TKey, double&gt;, Func&lt;TItem, TItem, TItem&gt;, Func&lt;TItem, double, TItem&gt;)
  
  </h3>

  <div class="markdown level1 summary"><p>Creates a new list with interpolated head and tail items based on the specified key range.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static List&lt;TItem&gt; GetSubListWithInterpolatedHeadAndTail&lt;TKey, TItem&gt;(this List&lt;TItem&gt; src, TKey beginKey, TKey endKey, Func&lt;TItem, TKey&gt; getKeyFunc, Func&lt;TKey, TKey, int&gt; keyCompareFunc, Func&lt;TKey, TKey, TKey&gt; keyMinusFunc, Func&lt;TKey, TKey, double&gt; keyDivFunc, Func&lt;TItem, TItem, TItem&gt; itemAddingFunc, Func&lt;TItem, double, TItem&gt; itemScalingFunc)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>src</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The source list.</p>
</dd>
    <dt><code>beginKey</code> <span class="xref">TKey</span></dt>
    <dd><p>The beginning key of the range.</p>
</dd>
    <dt><code>endKey</code> <span class="xref">TKey</span></dt>
    <dd><p>The ending key of the range.</p>
</dd>
    <dt><code>getKeyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, TKey&gt;</dt>
    <dd><p>A function that extracts the key from an item.</p>
</dd>
    <dt><code>keyCompareFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TKey, TKey, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a>&gt;</dt>
    <dd><p>A function that compares two keys.</p>
</dd>
    <dt><code>keyMinusFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TKey, TKey, TKey&gt;</dt>
    <dd><p>A function that subtracts one key from another.</p>
</dd>
    <dt><code>keyDivFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TKey, TKey, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>&gt;</dt>
    <dd><p>A function that divides one key by another to get a ratio.</p>
</dd>
    <dt><code>itemAddingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, TItem, TItem&gt;</dt>
    <dd><p>A function that adds two items together.</p>
</dd>
    <dt><code>itemScalingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>, TItem&gt;</dt>
    <dd><p>A function that scales an item by a factor.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>A new list with interpolated head and tail items.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TKey</code></dt>
    <dd><p>The type of the key.</p>
</dd>
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedTail_" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedTail*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedTail__1_System_Collections_Generic_List___0__System_TimeSpan_System_Func___0_System_TimeSpan__System_Func___0___0___0__System_Func___0_System_Double___0__" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedTail``1(System.Collections.Generic.List{``0},System.TimeSpan,System.Func{``0,System.TimeSpan},System.Func{``0,``0,``0},System.Func{``0,System.Double,``0})">
  GetSubListWithInterpolatedTail&lt;TItem&gt;(List&lt;TItem&gt;, TimeSpan, Func&lt;TItem, TimeSpan&gt;, Func&lt;TItem, TItem, TItem&gt;, Func&lt;TItem, double, TItem&gt;)
  
  </h3>

  <div class="markdown level1 summary"><p>Creates a new list with an interpolated tail item based on the specified TimeSpan key.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static List&lt;TItem&gt; GetSubListWithInterpolatedTail&lt;TItem&gt;(this List&lt;TItem&gt; src, TimeSpan endKey, Func&lt;TItem, TimeSpan&gt; getKeyFunc, Func&lt;TItem, TItem, TItem&gt; addingFunc, Func&lt;TItem, double, TItem&gt; scalingFunc)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>src</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The source list.</p>
</dd>
    <dt><code>endKey</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.timespan">TimeSpan</a></dt>
    <dd><p>The ending TimeSpan key for interpolation.</p>
</dd>
    <dt><code>getKeyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.timespan">TimeSpan</a>&gt;</dt>
    <dd><p>A function that extracts the TimeSpan key from an item.</p>
</dd>
    <dt><code>addingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, TItem, TItem&gt;</dt>
    <dd><p>A function that adds two items together.</p>
</dd>
    <dt><code>scalingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>, TItem&gt;</dt>
    <dd><p>A function that scales an item by a factor.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>A new list with an interpolated tail item.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedTail_" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedTail*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedTail__2_System_Collections_Generic_List___1____0_System_Func___1___0__" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedTail``2(System.Collections.Generic.List{``1},``0,System.Func{``1,``0})">
  GetSubListWithInterpolatedTail&lt;TKey, TItem&gt;(List&lt;TItem&gt;, TKey, Func&lt;TItem, TKey&gt;)
  
  </h3>

  <div class="markdown level1 summary"><p>Creates a new list with an interpolated tail item based on the specified key, using operators for both key and item operations.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static List&lt;TItem&gt; GetSubListWithInterpolatedTail&lt;TKey, TItem&gt;(this List&lt;TItem&gt; src, TKey endKey, Func&lt;TItem, TKey&gt; getKeyFunc) where TKey : IComparable&lt;TKey&gt;, ISubtractionOperators&lt;TKey, TKey, TKey&gt;, IDivisionOperators&lt;TKey, TKey, double&gt; where TItem : IAdditionOperators&lt;TItem, TItem, TItem&gt;, IMultiplyOperators&lt;TItem, double, TItem&gt;</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>src</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The source list.</p>
</dd>
    <dt><code>endKey</code> <span class="xref">TKey</span></dt>
    <dd><p>The ending key for interpolation.</p>
</dd>
    <dt><code>getKeyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, TKey&gt;</dt>
    <dd><p>A function that extracts the key from an item.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>A new list with an interpolated tail item.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TKey</code></dt>
    <dd><p>The type of the key, which must support comparison, subtraction, and division operators.</p>
</dd>
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list, which must support addition and multiplication operators.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedTail_" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedTail*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedTail__2_System_Collections_Generic_List___1____0_System_Func___1___0__System_Func___0___0_System_Int32__System_Func___0___0___0__System_Func___0___0_System_Double__System_Func___1___1___1__System_Func___1_System_Double___1__" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedTail``2(System.Collections.Generic.List{``1},``0,System.Func{``1,``0},System.Func{``0,``0,System.Int32},System.Func{``0,``0,``0},System.Func{``0,``0,System.Double},System.Func{``1,``1,``1},System.Func{``1,System.Double,``1})">
  GetSubListWithInterpolatedTail&lt;TKey, TItem&gt;(List&lt;TItem&gt;, TKey, Func&lt;TItem, TKey&gt;, Func&lt;TKey, TKey, int&gt;, Func&lt;TKey, TKey, TKey&gt;, Func&lt;TKey, TKey, double&gt;, Func&lt;TItem, TItem, TItem&gt;, Func&lt;TItem, double, TItem&gt;)
  
  </h3>

  <div class="markdown level1 summary"><p>Creates a new list with an interpolated tail item based on the specified key.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static List&lt;TItem&gt; GetSubListWithInterpolatedTail&lt;TKey, TItem&gt;(this List&lt;TItem&gt; src, TKey endKey, Func&lt;TItem, TKey&gt; getKeyFunc, Func&lt;TKey, TKey, int&gt; keyCompareFunc, Func&lt;TKey, TKey, TKey&gt; keyMinusFunc, Func&lt;TKey, TKey, double&gt; keyDivFunc, Func&lt;TItem, TItem, TItem&gt; itemAddingFunc, Func&lt;TItem, double, TItem&gt; itemScalingFunc)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>src</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The source list.</p>
</dd>
    <dt><code>endKey</code> <span class="xref">TKey</span></dt>
    <dd><p>The ending key for interpolation.</p>
</dd>
    <dt><code>getKeyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, TKey&gt;</dt>
    <dd><p>A function that extracts the key from an item.</p>
</dd>
    <dt><code>keyCompareFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TKey, TKey, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a>&gt;</dt>
    <dd><p>A function that compares two keys.</p>
</dd>
    <dt><code>keyMinusFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TKey, TKey, TKey&gt;</dt>
    <dd><p>A function that subtracts one key from another.</p>
</dd>
    <dt><code>keyDivFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TKey, TKey, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>&gt;</dt>
    <dd><p>A function that divides one key by another to get a ratio.</p>
</dd>
    <dt><code>itemAddingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, TItem, TItem&gt;</dt>
    <dd><p>A function that adds two items together.</p>
</dd>
    <dt><code>itemScalingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>, TItem&gt;</dt>
    <dd><p>A function that scales an item by a factor.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>A new list with an interpolated tail item.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TKey</code></dt>
    <dd><p>The type of the key.</p>
</dd>
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedTail_" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedTail*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_GetSubListWithInterpolatedTail__2_System_Collections_Generic_List___1____0_System_Func___1___0__System_Func___1___1___1__System_Func___1_System_Double___1__" data-uid="Hi.Common.Collections.ListUtil.GetSubListWithInterpolatedTail``2(System.Collections.Generic.List{``1},``0,System.Func{``1,``0},System.Func{``1,``1,``1},System.Func{``1,System.Double,``1})">
  GetSubListWithInterpolatedTail&lt;TKey, TItem&gt;(List&lt;TItem&gt;, TKey, Func&lt;TItem, TKey&gt;, Func&lt;TItem, TItem, TItem&gt;, Func&lt;TItem, double, TItem&gt;)
  
  </h3>

  <div class="markdown level1 summary"><p>Creates a new list with an interpolated tail item based on the specified key, using operators for key operations.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static List&lt;TItem&gt; GetSubListWithInterpolatedTail&lt;TKey, TItem&gt;(this List&lt;TItem&gt; src, TKey endKey, Func&lt;TItem, TKey&gt; getKeyFunc, Func&lt;TItem, TItem, TItem&gt; addingFunc, Func&lt;TItem, double, TItem&gt; scalingFunc) where TKey : IComparable&lt;TKey&gt;, ISubtractionOperators&lt;TKey, TKey, TKey&gt;, IDivisionOperators&lt;TKey, TKey, double&gt;</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>src</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>The source list.</p>
</dd>
    <dt><code>endKey</code> <span class="xref">TKey</span></dt>
    <dd><p>The ending key for interpolation.</p>
</dd>
    <dt><code>getKeyFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;TItem, TKey&gt;</dt>
    <dd><p>A function that extracts the key from an item.</p>
</dd>
    <dt><code>addingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, TItem, TItem&gt;</dt>
    <dd><p>A function that adds two items together.</p>
</dd>
    <dt><code>scalingFunc</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.func-3">Func</a>&lt;TItem, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a>, TItem&gt;</dt>
    <dd><p>A function that scales an item by a factor.</p>
</dd>
  </dl>

  <h4 class="section">Returns</h4>
  <dl class="parameters">
    <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1">List</a>&lt;TItem&gt;</dt>
    <dd><p>A new list with an interpolated tail item.</p>
</dd>
  </dl>

  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TKey</code></dt>
    <dd><p>The type of the key, which must support comparison, subtraction, and division operators.</p>
</dd>
    <dt><code>TItem</code></dt>
    <dd><p>The type of items in the list.</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_Swap_" data-uid="Hi.Common.Collections.ListUtil.Swap*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_Swap__1_System_Collections_Generic_IList___0__System_Int32_System_Int32_" data-uid="Hi.Common.Collections.ListUtil.Swap``1(System.Collections.Generic.IList{``0},System.Int32,System.Int32)">
  Swap&lt;TItem&gt;(IList&lt;TItem&gt;, int, int)
  
  </h3>

  <div class="markdown level1 summary"><p>Swaps two elements in a list at the specified indices.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static void Swap&lt;TItem&gt;(this IList&lt;TItem&gt; src, int indexA, int indexB)</code></pre>
  </div>

  <h4 class="section">Parameters</h4>
  <dl class="parameters">
    <dt><code>src</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ilist-1">IList</a>&lt;TItem&gt;</dt>
    <dd><p>The source list</p>
</dd>
    <dt><code>indexA</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd><p>The index of the first element to swap</p>
</dd>
    <dt><code>indexB</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
    <dd><p>The index of the second element to swap</p>
</dd>
  </dl>


  <h4 class="section">Type Parameters</h4>
  <dl class="parameters">
    <dt><code>TItem</code></dt>
    <dd><p>The type of elements in the list</p>
</dd>
  </dl>










  <a id="Hi_Common_Collections_ListUtil_TestFloorCeil_" data-uid="Hi.Common.Collections.ListUtil.TestFloorCeil*"></a>

  <h3 id="Hi_Common_Collections_ListUtil_TestFloorCeil" data-uid="Hi.Common.Collections.ListUtil.TestFloorCeil">
  TestFloorCeil()
  
  </h3>

  <div class="markdown level1 summary"><p>Tests the floor and ceiling functionality with sample data.</p>
</div>
  <div class="markdown level1 conceptual"></div>

  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public static void TestFloorCeil()</code></pre>
  </div>














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